1. Department of Physical Therapy, School of Health Sciences at Fukuoka, International University of Health and Welfare: 137-1 Enokizu, Okawa, Fukuoka 831-8501, Japan
2. Graduate School of Medical Science, Saga University, Japan
3. Department of Physical Therapy, Faculty of Health and Welfare, Prefectural University of Hiroshima, Japan
4. Department of Physical Therapy, Yanagawa Rehabilitation School, Japan